55072771 has 8 divisors (see below), whose sum is σ = 61222784. Its totient is φ = 49196160.

The previous prime is 55072763. The next prime is 55072781. The reversal of 55072771 is 17727055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55072771 - 2³ = 55072763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55072781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67926 + ... + 68731.

It is an arithmetic number, because the mean of its divisors is an integer number (7652848).

Almost surely, 2^55072771 is an apocalyptic number.

55072771 is a deficient number, since it is larger than the sum of its proper divisors (6150013).

55072771 is a wasteful number, since it uses less digits than its factorization.

55072771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136701.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 55072771 is about 7421.1030851215. The cubic root of 55072771 is about 380.4628961905.

The spelling of 55072771 in words is "fifty-five million, seventy-two thousand, seven hundred seventy-one".